battery check before ota

src/ota.cpp

@@ -42,6 +42,14 @@ inline String getHeaderValue(String header, String headerName) {
 
 void start_ota_update() {
 
+// check battery status if we can before doing ota
+#ifdef HAS_BATTERY_PROBE
+  if (batt_voltage < OTA_MIN_BATT) {
+    ESP_LOGW(TAG, "Battery voltage %dmV too low for OTA", batt_voltage);
+    return;
+  }
+#endif
+
 // turn on LED
 #if (HAS_LED != NOT_A_PIN)
 #ifdef LED_ACTIVE_LOW
@@ -107,7 +115,6 @@ void start_ota_update() {
 
 } // start_ota_update
 
-
 void do_ota_update() {
   char buf[17];
 

src/paxcounter.conf

@@ -68,6 +68,7 @@
 // OTA settings
 #define WIFI_MAX_TRY                    20      // maximum number of wifi connect attempts for OTA update [default = 20]
 #define FLASH_MAX_TRY                   3       // maximum number of attempts for writing update binary to flash [default = 3]
+#define OTA_MIN_BATT                    3700    // minimum battery level vor OTA [millivolt]
 
 // LMIC settings
 // define hardware independent LMIC settings here, settings of standard library in /lmic/config.h will be ignored